DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
Pin Descriptions
Pin #
1
2, 3, 8, 12
4
5
6
7
9
10
11
13
14
15
16
EP
Symbol
TS
N/C
STAT
VSS
DRV
T2X
BAT
VSS
GATE
VP
CSI
BSENSE
VCC
Function
Battery temperature sense input.
Not connected.
Battery charger status output. Connect an LED in series with 2.2k from STAT to VIN for a visual
monitor battery charge state or connect to a microcontroller to monitor battery status. A 100k
resistor should be placed between STAT and VIN for this function.
Common ground connection.
Battery charge control output.
Battery trickle charge control input. Connect this pin to VSS to double the battery trickle charge cur-
rent. Leave this pin floating for normal trickle current (10% of full charge current). To enter micro-
controller fast-read status, pull this pin high during power up.
Battery charge control output. Current regulated output to charge the battery. For best operation, a
0.1μF ceramic capacitor should be placed between BAT and GND.
Common ground connection.
Input voltage for biasing the pass device.
Battery charge power input.
Current sense input.
Battery voltage sense input.
AAT3682 bias input power.
Exposed paddle (bottom); connect to GND directly beneath the package.
Pin Configuration
QFN44-16
(Top View)
TS 1
N/C 2
N/C 3
STAT 4
AAT3682
12 N/C
11 GATE
10 VSS
9 BAT
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012